Isomeric effects of Al13 Keggin clusters as catalyst support on oxidation reactions
Atsunobu Tateno1, Wei Zhou1, Ailing Gao1
1Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan. ogiwara.naoki.165@m.kyushu-u.ac.jp.
Abstract:
Ionic crystals were synthesized by combining a catalytically active polyoxometalate [Al(OH)6Mo6O18]3- with Keggin-type [Al13O4(OH)24(H2O)12]7+ isomers (ε-Al13 or δ-Al13) serving as catalyst supports. The influence of the Al13 isomers on catalytic activity in sulfide oxidation was systematically investigated. The ionic crystal containing δ-Al13 exhibited superior catalytic performance, which was attributed to stronger interactions with sulfide substrates, as evidenced by solid-state NMR measurements. These findings highlight that exploiting Al13 structural isomers provides a novel strategy to the design and synthesis of supported catalysts.
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